fix literal-s2c #963
IMAP: fix SORT-ing on multiple criteria
AUTOREPLY: check Precedence header
DELIVERY: make soft/hard bounce on over-quota configurable
IMAP: fix back-propagation of append errors
IMAP: optimize tokenizer for large APPENDs
IMAP: config option MAX_MESSAGE_SIZE allowed by APPEND
IMAP: fix leakage from optimize tokenizer change
partial POSIX compliance cleanup #967
IMAP: (wip) thread-race fix
IMAP: cleanups
IMAP: cleanups and small optimization
wip jemalloc support
wip: fix leakage
rebuild autotools after jemalloc addition
allow compilation without jemalloc
reduce reachable
Revert "wip: fix leakage"

This reverts commit 2e1f3e56930aff0d2cdf2b0972332b7e91e18dc2.
allow explicit disabling of jemalloc

jemalloc is great, but valgrind doesn't cooperate with it
reduce reachable